//写cookie
//n：cookie名 v：cookie值 e：有效期（天） p：有效路径 d：域名 s：安全
function setCookie(n, v, e, p, d, s) {
    var t = new Date();
    t.setTime(t.getTime());
    if (!e) { e = 365; }
    if (!p) { p = '/'; }
    e = e * 1000 * 60 * 60 * 24;
    var e_date = new Date(t.getTime() + (e));
    document.cookie = n + '=' + encodeURIComponent(v) + ((e) ? ';expires=' + e_date.toGMTString() : '') + ((p) ? ';path=' + p : '') + ((d) ? ';domain=' + d : '') + ((s) ? ';secure' : '');
}
function getCookie(n) {
    var c = document.cookie.split("; ");
    for (var i = 0; i < c.length; i++) {
        var p = c[i].split("=");
        if (n == p[0])
            try {
                return decodeURIComponent(p[1])
            } catch (e) {
            return null
        }
    }
    return null;
}
function set_cl(c) {
    setCookie("skin", c, 365, "", getFirstDomain(),"");
    $('skinc').href = "/css/" + c + ".css";
}
function getFirstDomain() {
    var host = window.location.host;
    var dotPosition = host.indexOf(".");
    if(dotPosition != -1)
    {
        return host.substring(dotPosition + 1, host.length);
    }
    else
    {
        return "";
    }
}